All ports
Port2703/UDP
sms-chatPort
2703
Protocol
UDP
Category
Registered
Service
sms-chat
What is port 2703?
Port 2703/UDP is a Registered port, registered with IANA for specific applications. It is associated with the sms-chat service.
SMS CHAT
Useful commands
nmapnmap -p 2703 -sV example.comnetcatnc -zv example.com 2703curlcurl -v http://example.com:2703/telnettelnet example.com 2703bash(echo > /dev/udp/example.com/2703) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2703/udpDeny
sudo ufw deny 2703/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2703 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2703 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2703/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2703" dir=in action=allow protocol=UDP localport=2703Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 2703/UDP?
Port 2703/UDP is associated with the sms-chat service. SMS CHAT
Is it safe to expose port 2703 to the Internet?
It depends on the service and configuration. Port 2703 (sms-chat) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 2703 is open?
You can use nmap: `nmap -p 2703 -sV example.com`, netcat: `nc -zv example.com 2703`, or the bash command: `(echo > /dev/udp/example.com/2703) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2703 on my firewall?
On Linux with UFW: `sudo ufw allow 2703/udp` (open) or `sudo ufw deny 2703/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2703 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2703" dir=in action=allow protocol=UDP localport=2703`.
What applications and services use port 2703?
Port 2703/UDP is used by the sms-chat service. Specific uses depend on the software and configuration. Check our related tools section for more information.